1. 1. Calculate the number of atoms in 1.5 moles of aluminum.
WARM-UP 10/28/13
1. Calculate the number of atoms in 1.5 moles of aluminum.
2. Calculate the number of atoms in 1.5 moles of aluminum chloride.
3. Calculate the number of moles that 7.23 x 1025 atoms of zinc make.

2. Calculate the mass of compounds.
10/28/13 Objective
Calculate the mass of compounds.
10/28/13 Agenda
1. Recap of the mole
2. Molar mass

3. Recap
A mole is 6.02 x 1023 of any thing
Avogadro’s number

4. Recap
1) Counting
2) Mass
3) Volume

5. The mass of a mole of an element.
Molar Mass
The mass of a mole of an element.
Why is it important?
We cannot count individual atoms or molecules. We can measure their mass though!

6. Molar Mass

7. The mass of any element can be found on the periodic table.
Molar Mass
Recap:
The mass of any element can be found on the periodic table.
Building on that concept –
How do we find the mass of a mole of a compound?

8. Molar Mass
Just like molecules are atoms added together, the molar mass of a compound can be found by adding the molar masses of the individual elements.
g/mol
g/mol
g/mol

9. The molar mass of dihydrogen monoxide is 18.015 g/mol!
H: 2 x =
O: 1 x =
2.0159
g/mol
The molar mass of dihydrogen monoxide is g/mol!

10. Sample Problem 10.4. And Practice Problems 7 and 8.
Molar Mass Practice
Sample Problem And Practice Problems 7 and 8.

11. Finish Measuring Matter worksheet. Lab Report due tomorrow!
Tutoring Today!
5th Period - 402
10/28/13 Homework
Finish Measuring Matter worksheet.
Lab Report due tomorrow!